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The LiftMaster LM21AFCB is a UL-listed fire control release device engineered to automatically close motorized or manual fire-rated doors in the event of an alarm or power loss
Function: Works with the RPM sensor to detect motor rotation and maintain accurate door travel limits
ensuring reliable performance in various environments
this drive belt pulley is engineered to mount securely to the motor input shaft
HySecurity MX3796 Circuit Breaker - 250V 5A gate-roller The LiftMaster LM21AFCB is aResettable Circuit Breaker For HySecurity Gate Operator Protection The HySecurity MX3796 Circuit Breaker is a resettable 250V, 5A breaker used in AC only HySecurity gate operator systems to help protect internal circuits from overload conditions. Replacing a failed or nuisance tripping breaker helps restore stable power delivery and reliable perimeter access operation. Always confirm the correct part number in your operator manual or parts diagram
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